Lobocarcinus sismondai

Lobocarcinus sismondai  is an extinct species of marine crab in the family Cancridae.

Part of a Pliocene-aged carapace was recovered, and is housed in the Yorkshire Museum. Another fossil specimen was recorded by Lipke Holthuis in 1949, based on fixed fingers and an isolated dactylus. That specimen was recovered from Miocene–Lower Pleistocene deposits in the Netherlands.